Questions tagged [boost]

A non-isolated DC/DC converter topology.

107 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
4
votes
0answers
501 views

4 switch Buck-Boost, boost not reaching designed current

I am working on a power supply that regulates the voltage coming out of a 3S LiPo battery. The buck portion of the circuit works fine and outputs 5+A with acceptable ripple. The Boost portion instead ...
3
votes
1answer
313 views

Control of interleaved boost converter

In a school project we will try to implement a control system for a boost power factor correction (PFC) converter. The converter circuit can be seen below (http://www.ti.com/lit/an/slyt517/slyt517.pdf)...
2
votes
1answer
85 views

Is boost converter enough to provide pulse currents without drawing too much current from a coin cell

I am making a RF circuit which could operate using a 3V coin cell battery like CR2032 or CR2450. In sleep mode it consumes around 10-20uA but during Tx/Rx which lasts for 10ms it consumes ~300mA-ms. ...
2
votes
0answers
46 views

MAX1771 not boosting voltage

I have made the below circuit using the MAX1771, but it does not work as intended. There is no increase in voltage at the output. It just outputs VIN minus diode drop at “CDI_TEST_HV”, as expected if ...
2
votes
0answers
126 views

Will this Arc Lighter Circuit Work?

I am attempting to build a really cool thing (at least I think). The goal is to build an arc lighter that I can shake to charge (kinetic power). It's a circuit that combines an arc lighter circuit ...
2
votes
1answer
41 views

Sensible way to power an OLED display from AAA Cells

I'm designing a small battery powered device and I want to use an SSD1327-based OLED display. Unlike the SSD1306, this one doesn't appear to have an integrated boost circuit to power the panel, which ...
2
votes
0answers
123 views

Power Supply Nixie tubes (IN 9)

I am in big trouble with my power supply for Nixie tubes (IN 9 bargraph.) I need 140V -160V (150V prefered) output voltage and 10x 12mA --> ~140mA current. (~ 21W). I tried to design boost ...
2
votes
0answers
346 views

Large negative current spike in N-Channel MOSFET source when turn-off

I am working on repairing a power supply board of a LCD TV (200W power), more specifically, the PFC section (active power factor correction). See schematic (adapted from here): I've replaced some ...
2
votes
1answer
224 views

Boost converter voltage drop when charging battery

I made a 4s battery pack made of 18650 LiFePO4 cells that I'm planning to use for a mobile computing hobby project. My plan for charging it is to use a salvaged power supply from a computer along ...
2
votes
2answers
375 views

Boost converter using TL5001

I am having a circuit for a TL5001 boost converter that outputs approximately 400 Volts. I am trying to modify the circuit as to output a voltage between 20V- 100V. The output current will be less ...
2
votes
0answers
630 views

Advanced ATX Power Supply Modifications

I know there are multiple tutorials and questions regarding converting an ATX power supply, new or old, to a benchtop power supply for projects. I'm fully aware of how to make the basic conversion to ...
1
vote
1answer
39 views

LM2733 boost circuit - inductor current requirements

I do not have much experience with boost circuits, and am having a hard time picking a suitable inductor required for my LM2733 boost circuit. I have done a lot of research on the actual boost circuit,...
1
vote
0answers
41 views

Boosting 3.0 - 4.6 Volts to 5V

I found this circuit that will auto switch between power between USB (5V) or a LiPo Battery (3.0V - 4.2V range). The schottky diode, D4, can have a voltage drop of about 0.4V which is too high for me....
1
vote
0answers
40 views

Design of a boost converter with large variation in output current and low output ripple

I'm working on the design of a 24V to 30V boost converter that needs to have an output ripple of less than 100 mV with an output current between 0 and 2 A. The output is used to power a controller for ...
1
vote
0answers
112 views

Problems on switching MOSFET for boost converter

**EDITED I am supposed to build a boost converter that steps-up a 1.5V input to 5V (also I only have 1.5V as my power source). I have designed the circuit out but the only problem I face right now is ...
1
vote
0answers
44 views

Synchronous boost light load operation and general SMPS terms

What are the differences between the skip cycle, pulse skipping, diode emulation, and forced PWM at general DC DC converter light load operations? How do they work and when do I want to use them? Page ...
1
vote
2answers
156 views

step up converter

I built a circuit of boost converter and my input voltages, 6-9V. I want to get output at the converter 9-12V, my problem is that I get over 40V and I do not know why, in the code do I have to set ...
1
vote
0answers
33 views

Multiple switches/FET's on a boost controller

I'm new to DC-DC converters and I am trying to design a 500W ~12V step up to 50V power supply. I've been looking into boost converters and controllers and I think I need to go with a controller to ...
1
vote
0answers
55 views

MT3608/SX1308/… boost converter shutdown current (module)

I have a few step-up converter modules such as https://www.aliexpress.com/item/33049532652.html supposedly based on the MT3608 IC: https://www.olimex.com/Products/Breadboarding/BB-PWR-3608/...
1
vote
2answers
81 views

How to implement step-up DC-DC converter with reverse current capability

I am trying to step up voltage from 24V to 36V using a boost converter, specifically the PI3740-00-LGIZ by Vicor, in order to power a motor. However, I want to be able to do regenerative braking with ...
1
vote
0answers
29 views

Boost converter - low inductance and discontinuous or high inductance and continuous?

I'm working on a battery powered application and I need to step up from ~3v to ~25V. I'm trying to balance the peak battery loads vs the overall performance. I'm torn on the inductor. I'm at ~2MHz ...
1
vote
0answers
20 views

Non-ideal inductor effect on inductor current in a quadratic boost converter

I'm studying a quadratic boost converter and I'm expecting to see in the lab a constant current in the inductors, with a small ripple associated with energy exchanges between the capacitive and ...
1
vote
0answers
62 views

Modelling DC/DC-Converter

i want to model a cascaded Buck/Boost-Converter with FAST like mentioned here: https://cbasso.pagesperso-orange.fr/Downloads/PPTs/Chris%20Basso%20APEC%20seminar%202013.pdf. The goal is to implement a ...
1
vote
0answers
62 views

Placing Input capacitor of boost after output capacitor

I have a battery charger for 12V input with integrated buck that charges a single cell (3.7V nominal). The charger also has a power path and I would like to place a boost converter to boost the 3.7V ...
1
vote
0answers
74 views

How to 3x or 4x a DC voltage while minimizing board space with no microcontroller?

I have a 3.7V DC voltage source that I'd like to boost to at least 10 Volts. I've been using Microchip's TC7660 component as a voltage doubler. But it only comes in SOIC (rather large for SMT). And ...
1
vote
1answer
32 views

Output voltage of NPC1403 boost converter circuit 0 during simluation

Currently, for my needs I'm trying to boost a 5v input to 15v with a minimum of 20ma current at the output. I found the NPC1403 to require my needs however, when i'm trying to simulate using EasyEDA ...
1
vote
0answers
46 views

Voltage step up module and if I am using it correctly

I am making a "simple" bluetooth speaker and have followed instructions from a Youtube video on how to assemble the components I have bought. However... I am finding that the rechargeable li-po ...
1
vote
0answers
138 views

How to disconnect 3.7V battery when USB is connected (boost)

I am developing a circuit which enables me to charge a lithium battery and boost the output voltage up to 5V for a microcontroller. My boost converter is the MT3608, and the charging circuit is the ...
1
vote
2answers
78 views

boost converter circuit behaving strangely

I built the following circuit: The boost onverter works fine when applying 0.5 time ON PWM signal (Vout = 2.5V) but when I try to increase the voltage using 0.8* time PWM signal the Vout** stays ...
1
vote
0answers
460 views

Driving a voltage boost circuit with a piezo driver circuit

For a university project, I'm creating my own small speaker. This speaker includes a speaker driver circuit consisting of a transistor and 3 resistors (see figure below). simulate this circuit –...
1
vote
1answer
105 views

Phase/Gain margin measurements for current mode boost regulator

I'm looking for where to place a sense resistor in the feedback path of a current mode boost regulator with a layout similar to the one in the picture. Should I place in on the FBL or FBH trace?
1
vote
0answers
400 views

RS-232 Level Shifter

Most PCs don't have RS232 built-in anymore. So the only option is USB-2-RS232 adapters or RS232 PCI-E card. While I expected the adapters to output a low voltage it turns out most RS232 PCI-E card ...
1
vote
0answers
157 views

Voltage-boosted switching boost converter

I refer to my previous question which may be found here. With the LT1172 the highest output voltage of the booster is about 60 V, or slightly more. Now I need more, say 100 V. Linear technologies' ...
1
vote
0answers
481 views

Analysis of a Bi-directional DC-DC converter

I'm building a bi-directional DC-DC converter that will be used to charge and discharge a supercapacitor stack. The design we came up with uses a 4-quadrant chopper, to allow buck-boost both ways. I'...
1
vote
0answers
1k views

High voltage, low current, power supply for night vision gen. 1+ tube - single AA cell or 3V

I would like to build a new power supply for a gen. 1+ night vision intensifier tube, the current supply is robust but big and heavy plus the input is 9 to 24V. The tube it self requires approximately ...
1
vote
0answers
496 views

MC34063 boost converter + PWM dimmer unstable output problem

I use NE555 & MC34063 to build a LED driver with dimmer function. The crcuit of NE555 , MC34063 & LED are bridged by a IRF640N NMOSFET. NE555 is responsible for adjusting the brightness and ...
1
vote
0answers
42 views

Active EN Pin When Device is Plugged in

I'm looking to use a TPS61xxx series DC-DC boost converter for a charger, but I only want the converter to be active once the USB cable is plugged into the receptacle. Now from my understanding, some ...
1
vote
0answers
184 views

Buck Boost Driver to switch 2 LED chains

simulate this circuit – Schematic created using CircuitLab I'm working on a project to turn 2 LED strings (each containing 6 HB LEDs). Here is my question. The Buck Boost driver I'm using is ...
1
vote
0answers
147 views

Influence the apparent input resistance of a buck-boost converter

I want to power a buck-boost regulator (for simplification, preferrably one of the integrated circuits from Linear Technology) with a current-limited or high inner resistance power supply. The power ...
1
vote
0answers
159 views

boost and flyback converter

I am currently analysing this circuit But I ran into some problem since the boost component standalone raises the voltage to 40v the flyback is suppose to bring up the voltage to a further 540v ...
1
vote
0answers
67 views

Should I drive control lines of an IC at voltages higher than VCC

I am designing a circuit that will be running from a single cell LiPo battery. The battery will provide the input voltage to a boost converter that will output 5V, which will power a microcontroller. ...
1
vote
0answers
3k views

Step Up DC DC [12 to 300] using MAX1771 Chip

I am trying to build my first circuit following the information posted here 12v to 300v Boost Converter - Ideal Inductor for 9kOhm load I tried to answer there before opening this new topic,but I need ...
1
vote
0answers
349 views

Which current ripple equation should I use? (Boost converter)

I am designing a boost converter for a microgrid as an university project. It is supposed to interface a 2.4kW 120V solar array (using MPPT) with a 380V DC bus. There will be other sources and loads ...
0
votes
0answers
89 views

switch the (pnp) BJT transistor

this is my buck boost converter in the simulation i get the desire voltage -12V but in real circuit i just getting -4.88V , and my transistor heats up i think it is even burned , I dont know how I ...
0
votes
0answers
41 views

DC-DC Boost Converter Only Works with a Second Supply

I'm trying to build a 5V to 8V boost converter to use at another mosfet's gate voltage. I'm using a PIC mcu to create a 50kHz square wave signal to switch the BUZ101L. For test purposes i also added a ...
0
votes
0answers
43 views

Low voltage (self-oscillating) boost for solar powered pond pump

Long story shortened: I am currently designing a small filter for my pond using a small pump (6V-12V, upto 540mA) with UV-C LEDs parallel to it. Currently, it is battery powered (9V, 6x1.5V AA cells) ...
0
votes
0answers
33 views

How does a boost converter power the oscillating circuit and load at the same time?

so I've put together a boost converter circuit of my own and I have a problem, I want my boost converter to output reasonably high current but whenever I connect a high current load - the astable ...
0
votes
0answers
27 views

Open a MOSFET with a step-up converter

Hello smart people of the internet. Please help me to solve a puzzle. I'm pretty sure there is something simple I'm missing. So here is what I have: I have a 2.2v battery that I want to discharge via ...
0
votes
0answers
33 views

Why does my input current inverter is high?

I have a problem with input current in my inverter is high. My inverter will use for solar panel and using boost converter to convert dc voltage 12-18 Volt to 24 volt. I'm using P channel mosfet ...
0
votes
1answer
37 views

Buck-Boost Transformer with Three Phase Wiring

I live in a residence with 120v / 208v electrical service. (Measured as leg1: 124v, leg2: 125v, 215v across legs) I am nearly certain that the service is the result of two legs of three phase power. ...